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1/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <signal.h>
20
21/* Set the handler for the signal SIG to HANDLER,
22 returning the old handler, or SIG_ERR on error. */
23__sighandler_t
24__sysv_signal (int sig, __sighandler_t handler)
25{
26 /* Check signal extents to protect __sigismember. */
27 if (handler == SIG_ERR || sig < 1 || sig >= NSIG)
28 {
29 __set_errno (EINVAL);
30 return SIG_ERR;
31 }
32
33 __set_errno (ENOSYS);
34
35 return SIG_ERR;
36}
37weak_alias (__sysv_signal, sysv_signal)
38
39stub_warning (sysv_signal)
40

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